Feeding device for pulverizers.



No. 635,!l3.

Patented Oct. l7 I899. w. m. wumnou.

FEEDING DEVICE FOR PULVERIZERS (Application filed Dec. 9, 1898.)

(No Model.)

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UNITED STATES PATENT @nnicn.

WILLIAM MAXWELL WHEILDON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THEAERO-PULVERIZER COMPANY, OF JERSEY CITY, NEW JERSEY.

FEEDING DEVICE FOR PULVERIZERS.

SPECIFICATION forming part of Letters Patent NO. 635,113, dated October17, 1899. Application filed December 9 1898. Serial No. 698,717. (Nomodel.)

To all whom it may concern:

Be it known that I, WILLIAM MAXWELL WHEILDON, a citizen of the UnitedStates, residing at Boston, in the county of Suffolk and State ofMassachusetts, have invented acertain new and useful Improvement inFeeding- Devices for Pulverizers and Similar Apparatus, (Case 0,) ofwhich the following is a specification.

My invention relates to various new and useful improvements in feedingdevices, especially adapted for use in connection with pulverizingapparatus designed for the re duction to an impalpable powder of anypulverizable material, such as coal coke, cement, sugar, graphite,drugs, gypsum, plaster, talc, slag, spices, grains, fertilizers, chalks,paintstuffs, foundry-facings, the.

The particular purpose for Which my improved feeding device is used isin connection with a pulverizer for. pulverizing coal to an impalpablepowder which is blown into the fire-box of a boiler. In an applicationfiled on even date herewith (Case 13) I de scribe an improved feedingdevice for this purpose wherein a feed-chamber is employed having anopening at its upper end through which the material is introduced andhaving a rotatable table Within said chamber, mech anism being providedfor varying the distance between said table and feed-opening, where bythe thickness of material accumulating on the table may be adjusted. Inthe specific form of mechanism described in said application therotatable table is adjustable relatively to the feed-opening. Insomeinstances it may be desirable to maintain the table in a fixed planeand to adjust the feed-opening toward and away from said table. Thisallows for a very simple and effective construction, In said applicationI also illustrate in connection with the rotatable table a relativelystationary shear adapted to sweep off from the table the materialaccumulated thereon. In some instances it may be desirable to provide anon-rotatable table and to employ a rotating shear or shears for forcingmaterial off of the table, the shear or shears moving over the uppersurface thereof. In my present form of feed device I employ a tablemounted in a feed-chamber having a feed-opening at its upper end throughwhich material is introduced, and I adjust the feedopening relatively tosaid table, whereby the thickness of material deposited on the table maybe adjusted. Specifically considered, I employ at the upper end of thefeed-chamber a verticallyadjustable collar or neck forming a part of thefeed-opening. In my present invention I also employ a non-rotatabletable comprising, essentially, a stationary circular platform, and Irotate with respect to said table one or more shears which sweep thematerial off of the table and deposit it in a suitable feed-ch ute. Itwill be understood that both of these features of invention may beemployed in a single structure or that one alone of such features may beso employedthat is to say, it will be possible, and, in some instances,desirable, to make use of a rotatable table and a stationaryshear, withthe vertically-adjustable collar to regulate the feed-supply, and, inother instances, it may be desirable to employ a stationary table and amovable shear or shears,with any other desired form of adjustingmechanism for varying the feed-supply.

In order that my invention may be better understood, attention isdirected to the accompanying drawings, forming a part of thisspecification, and in which- Figure 1 is an interior plan viewwith theupper section of the casing removed, and. Fig. 2 a vertical sectionillustrating a part of the neck and adj usting-sleeve in elevation.

In both of the above views corresponding parts are represented by thesame numerals of reference.

The body of the feed device is composed, essentially, of two parts orcasings-an upper portion 1 and a lower portion 2bolted together at thecenter on ahorizontal line. The sectionvl is provided with afeed-opening 8 at its upper end, in which material is introduced in anysuitable way-as, for example, from a hopper. This feed-opening extendsWithin the interior of the feed-chamber and constitutes a cylindricalneck 4, located con-' centrically of said chamber. Mounted Within theneck 4 is an adjusting or regulating sleeve 5, adapted to telescope to agreater or less extent within said neck. This sleeve is adjustedvertically in any suitable way, but preferably by means of a lever 6,pivoted at 7 and extending through an opening 8, formed in thesection 1. On its inner end the lever 6 is provided with forked arms 9,having slotted ends 10, which engage with trunnions 11, formed on theregulating-sleeve 5. The trunnions 11 work in slots 12 in the neck t andby means of which the vertical movements of the sleeve 5 will be guided.The lever 6 is provided at its end with a handle 13 and with aclamping-screw 14, adapted to clamp the lever at any desired point onthequadrant 15, cast with the section 1.

The upper portion of the section 2 is formed to constitute anessentially circular flat stationary table 16, located below the neck 4and regulating sleeve 5. Concentric with this stationary table is achannel 17 of a gradually-increasing depth, as shown, said channelcommunicating at its deepest portion with the exit-opening 18. It willbe observed that any material swept from the table 16 will fall into thechannel 17 and will flow down the same to the exit-opening 18. Thesection 2 of the feed-chamber is formed with a bearing "19, in which ismounted a vertical shaft 20.

This shaft is operated in any suitable way. Keyed to the shaft 20 withinthe feed-chainher is a deflecting-cone 21, having one or more radialcast arms 22. Each of these arms car- 'ries a shear 23, arranged at anangle to the diameter of the table and slightly curved, as shown. Theouter ends of the shear or shears overlap the stationary table 16, aswill be understood. Preferably, also, the shear or each of the shears isat its outer end curved slightly out of the vertical, whereby when theshear or shears are moved over the surface of the table 16 by therotation of the shaft 20 the material will be swept off of the table inline with the shears and deposited in the channel 17. Preferably theshaft 20 above the deflecting-cone 21 carries a sleeve 24, havingagitating-arms 25, cast integrally therewith and located in theregulating-sleeve 5 to agitate the material therein and prevent itsformation into clot-s or aggregates tending to clog the device andprevent a uniform feed to the'table 16. In order to prevent materialfrom working under the deflecting-cone 21 and injuring the bearing 19, Ipreferably form the table 16 with an annular ridge 26 surrounding theshaft and working in a recess 27 in said deflecting-cone.

The operation of myimproved feed device will be as follows: Materialbeing supplied to the neck 4 falls by its weight through theregulating-sleeve 5 onto the deflecting-cone 21 and is spread out uponthe table 16.v The shaft 20 being rotated, the shear or shears will 4 becarried with respect to the table 16 and reason of the incline over tothe dischargeopening 18. Preferably the section 1 is provided with anopening 28 therein sufficiently large to admit the arm of the operatorto clean out the device in case it becomes choked. It will be observedthat by adjusting the distance between the lower end of theregulating-sleeve and the table 16 by operating the handle 6 thethickness of material which will be deposited on said table will bevaried, and in consequence the quantity of material swept off of thetable by the operation of the shear or shears can be adjusted to anydesired extent.

Haying now described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows: v 1. In a feeding device, thecombination of a feed-chamber, a fiat stationary table therein, achannel concentric with said table but of increasing depth, and a shearrotatable with respect to the table for removing material therefrom by ascraping action, substantially as set forth. 2. In a feeding device, thecombination of afeed-chainber, aiiat stationary table mounted in saidchamber, a concentric channel of increasing depth surrounding saidtable, a shear movable with respect to said table for removing materialtherefrom, a neck in the casing through which material is introduced,

a vertically-adjustable regulating-sleeve in said neck, adeflecting-cone rotatable with said shear, and means for removingmaterial from said table, substantially as set forth. I,

In a feeding device, the combination of afeed-chamber, a fiat stationarytable mounted in said chamber, a concentric channel of increasing depthsurrounding said table, a shear movable with respect to said table forremoving material therefrom, a neck in the casing through which materialis introduced, a vertically-adj ustable regulating-sleeve in said neck,a deflecting-cone rotatable with said shear, and a series ofagitating-arms for agitating the material within said regulatingsleeve,substantially as set forth.

4. In a feeding device, the combination of a feed-chamber, a flatstationary table mounted in said chamber, a shaft passing verticallythrough said table, a cone carried on the end of, said shaft androtating immediately above the table, a plurality of curved shearscarried by the cone and rotated by the shaft immediately over the table,so as to remove material therefrom by a scraping action, a neck in thecasing through which material is introduced, movable toward and awayfrom the table and within the shears, and means for adjusting the saidneck, substantially as set forth.

5. In a feeding device, the combination of a feed-chamber, a flatstationary table mounted in said chamber, a shaft passing verticallythrough said table, a cone carried on the end of said shaft and rotatingimmediately above the table, a plurality of curved shears car ried bythe cone and rotated by the shaft immediately over the table, so as toremove material therefrom by a scraping action, a neck in the easingthrough which material is introduced, a vertically-adj ustableregulatingsleeve in said neck, movable toward and away from the tableand Within the shears, and means for adjusting the said neck, thefeedohalnber being" provided with an opening WILLIAM MAXWELL WHEILDDN.

Witnesses: I

HELEN P. NELSON, ALBERT E. LITTLE.

